Electrically conductive membranes featuring integrated porous feed spacers for superior antifouling performance

IF 10.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

npj Clean Water Pub Date : 2025-07-13 DOI:10.1038/s41545-025-00497-9

Yazan Ibrahim, Muzamil Khatri, Noman Khalid Khanzada, Nidal Hilal

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Abstract

Surface patterning is a promising anti-fouling strategy, yet its integration with conductive polymers remains underexplored. This study investigates electrically conductive, surface-patterned membranes with integrated porous feed spacers using polyaniline (PANI) as a conductive additive in polyethersulfone (PES) membranes. Among tested concentrations (0.25–2.00 wt.%), 1.00 wt.% PANI membrane (PN1) showed the best performance, with electrical conductivity of ≈130.5 ± 2.87 mS·m⁻¹ and pure water flux of 107.2 ± 15.5 L·m⁻²·h⁻¹ which is around five times that of pristine PES membrane. Under a 4 V electric field, PN1 exhibited lower flux decline (60.6%) and higher flux recovery (FRR 90.1 ± 2.15%). Surface-patterned PN1 membrane (PN1_Patterned) further enhanced performance, achieving a flux of 168.2 ± 20.7 L·m⁻²·h⁻¹ and reduced fouling (51.6% flux decline) compared to surface-patterned PES membrane (66.7%). PN1_Patterned membrane also showed higher FRR (95.4 ± 1.68%) and stable natural organic matter (NOM) rejection ( > 92.9 ± 1.65%). These results highlight the synergistic benefits of combining conductivity with surface patterning, offering a potential approach for improved membrane performance.

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导电膜具有集成的多孔进料垫片优越的防污性能

表面图像化是一种很有前途的防污策略，但它与导电聚合物的结合仍有待探索。本研究采用聚苯胺（PANI）作为导电添加剂，在聚醚砜（PES）膜中制备了具有集成多孔进料间隔的导电表面图案膜。在测试浓度（0.25-2.00 wt.%）中，1.00 wt.%。% PANI膜（PN1）的电导率为≈130.5±2.87 mS·m−1，纯水通量为107.2±15.5 L·m−2·h−1，是原始PES膜的5倍左右。在4 V电场作用下，PN1具有较低的磁通衰减率（60.6%）和较高的磁通回收率（FRR 90.1±2.15%）。表面图案化的PN1膜（PN1_Patterned）进一步提高了性能，与表面图案化的PES膜（66.7%）相比，通量达到168.2±20.7 L·m−2·h−1，减少了51.6%的污染（通量下降）。pn1_pattern膜具有较高的FRR（95.4±1.68%）和稳定的天然有机物（NOM）去除率（92.9±1.65%）。这些结果突出了将电导率与表面图像化相结合的协同效益，为改善膜性能提供了一种潜在的方法。

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来源期刊

npj Clean Water Environmental Science-Water Science and Technology

CiteScore

15.30

自引率

2.60%

发文量

审稿时长

5 weeks

期刊介绍： npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.